DILLENITTS'S ' HISTORIA MUSCOBUM.' 567 



be C. tenacc, Ach. ; but as both are sterile and but little evolute, 

 this is uncertain. 



F. 30. Lichenoides pellucidum fuscum corniculatum, p. 143,=: 

 Leptogiitm palmatum (LTuds.). Fertile. The specimen is quite 

 typical, though only very young apothecia are present. 



F. 31. Lichenoides pellucidum, Endivise foliis tenuibus crispis, 

 p. 143. A, B=LEPToaitJM lacertjm (Sic). Typical but sterile. 

 C = L. lacertjm f. fimbriatum, Hffm,. Sterile. This is the 

 Lichen tremelloides of Hudson and our older lichenists. 



F. 32. Lichenoides pellucidum, Latucae folio sinuoso, p. 145, 

 Leptogium margi^elltjm (Slv.). Sufficiently typical and fertile, 

 though in several fragmentary specimens. Correctly referred to 

 this species by Acharius. 



F. 33. Lichenoides tenue crisputn, foliis parvis depressis, p. 145, 



Leptogium sinuatum (Huds.). Fertile. Several specimens ; 

 but all, with a single exception, sterile. 



F. 34. Lichenoides tenue crispum, foliis exiguis surrectis, 

 p. 146. A = Leptogium lacertjm # pulvinatum {Hffm.). Seve- 

 ral sterile fragmentary specimens. B = Leptogium sinuatum 

 {Suds.) minus. Fertile. Not distinguished by authors from 

 the preceding. Along with these are fragments of Collema chei- 

 leum, fertile, and of O. crispum, var. ceramoides, Borr. Sterile. 



F. 35. Lichenoides tenue crispum et veluti aculeatum, p. 146, 



Leptogium lacerum * pulvinatum (Hffm.). Sterile. This 

 differs from 34 A only in having the laciniae more crowded and 

 denticulate. The figures, however, sub lift. I. m, n are by no means 

 very characteristic. This has not hitherto been identified. 



Series II. Drier and sapless species, scutellate. 



Division I. Scutellae seated on a pedicle. 



Tab. XX., DHL Hist. Muse. 



F. 39. Lichenoides glaucum perlatum, subtus nigrum et cirro- 

 sum, p. 147. A=Parmelia perlata (£.). Sterile and frag- 

 mentary. B = P. perlata f. sorediata, Schcer. Infertile. Re- 

 ferred by Ach. in L. TJ. to his var. olivetorum. C = Parmelia 

 Borreri, Turn. Sterile. Now for the first time identified. 

 D = P. perlata (£.). Typical and fertile. E=a small sterile 

 condition of the same. 



F. 42. Lichenoides glaucum, foliorum laciniis crinitis, p. 149. 

 A=Parmelia perforata, Ach. Typical and fertile. B=Par- 

 Melia hypotropa, Nyl. Sterile. According to JNylander in litt. % 



LINN. JOURN. — BOTANY, VOL. XVII. 2 T 



